Mylla No1 for the critical moment of root establishment
In the first growing window, young trees either connect with the soil or they don’t. If that connection fails, nutrients leach, biology stalls, and the chance to build a strong root-soil relationship is gone.
This small-batch fermented substrate is crafted to protect that window, supporting a living, structured planting zone where roots can settle and soil function can begin.
Establishment is won or lost before you can see it.
Optimised for Stockholm model tree pits and other structural soil systems.
This is a fermented planting substrate for growers, nurseries, landscapers, and land stewards who want to build soil function from the root zone outward.
It is not a synthetic fertilizer. It is not a standard potting mix. It is a crafted soil input designed to improve the physical, chemical, and biological conditions around roots during the most important phase of establishment.
The substrate is built around carbon-rich materials that are prepared through fermentation and careful blending. The result is a living soil amendment designed to support structure, nutrient exchange, microbial activity, and long-term fertility.
After more than three years in Stockholm‑model tree pits, it has consistently delivered strong establishment and robust growth in some of the most demanding high‑latitude urban conditions.
Charged Biochar
Fermented Carbon
Activated Trace Minerals
Hand Crafted in small batches
Why fermentation matters
Time changes the material
Fermentation is not just a production step. It is an integral part of the product, retaining and cycling biologically active carbon through the soil.
Instead of combining raw materials and composting, through our proprietary method, we give the ingredients time to interact. Biology then enhances the chemical reactivity of the substrate. Carbon surfaces are conditioned. Minerals and organic compounds become part of an integrated soil matrix.
That process creates a material that is not only prepared but enhanced for the root zone. When used during planting, it creates a receptive environment for roots, microbes, moisture, and nutrient cycling.
Three functions in one substrate
Chemically Active
Biologically Energising
Physically Transformative
Chemically active
Fertility depends on exchange, not just addition.
The substrate is designed to create an active nutrient environment around roots. Carbon-rich surfaces, biologically available minerals, and fermentation-derived compounds, proteins, peptides and amino acids support the soil’s ability to hold, buffer, and release nutrients over time to ensure your soil & plants are always fed.
Biologically energising
Living soil depends on biological momentum.
Fermented inputs support microbial activity and the enzyme-driven processes that make nutrients available. The aim is to create a root-zone environment where biology can begin working early after planting.
Physically transformative
Roots need structure, air, and pathways.
The carbon-rich fraction supports aggregation, porosity, water movement, and root exploration. This is especially valuable in tired, compacted, or low-function soils where establishment is often slow.
How it works
The fermented planting substrate is used directly in the planting zone. It can be blended into planting holes, incorporated into nursery beds, mixed with existing soil during establishment, or used as part of a wider soil restoration protocol.
It is best used when the goal is to improve the environment around the root system, not simply add nutrition from above.
Best-fit applications
Tree, shrub, and perennial planting (20% of plant pit by volume)
Airpot nursery cultivation (specific blends per species)
Restoration of damaged or depleted soils (to be used as concentrate)
Practical note
Use as part of a soil-aware planting approach. The best results come when substrate use is paired with good planting technique, moisture management, and an understanding of the existing soil conditions.
How to use
Use it where roots begin
The real gap in our industry isn’t nutrients – it’s biologically active organic matter. When that is missing, we miss the short window to knit roots into the surrounding soil or substrate.
MyllaNo1 was created exactly for this purpose: the development of a genuinely functional soil environment that works for years not weeks.
Fertile soil is not only nutrient-rich. It has structure, biological activity, exchange capacity, moisture balance, and resilience under stress. These qualities cannot be forced instantly. They are cultivated through the right materials, the right process, and the right timing.
Why it exists
Because soil fertility is grown never added
Bringing Craft back to Soil Care
Over 10 years of refinement, now, every batch is made with attention to texture, moisture, smell, maturity, and biological readiness. It is crafted to order and does not sit in the warehouse losing potency.
This is not a commodity substrate produced as quickly as possible. It is a crafted material where the making process matters. Small-batch production allows us to observe the fermentation, adjust the blend, and keep the final substrate connected to its purpose: supporting living soil.
The result is a material with character, consistency, and intention.
Built in small batches
Same species, two very different outcomes.
The tree on the left was planted using a conventional compost-based approach. The tree on the right was established with Mylla No1.
This example illustrates how soil-input decisions can influence establishment, canopy development, and the long-term cost of urban planting.
Soil care in our opinion should be of a primary consideration, not an afterthought.
The Long-Term Value of Better Soil Inputs
Grown through craft, not manufactured
Mylla No1 is for growers, nurseries, landscapers, and land stewards who want to establish plants in a more functional soil environment. Our plants – and the places they anchor – are too valuable to leave soil care to chance.
Made by 59 Degrees in small batches, it brings together carbon craft, fermentation, and soil function in a practical material for real planting work.
Soil fertility is not manufactured on demand; it is cultivated, structured, and brought to life over time – starting in the planting zone with what you choose to put around the roots.
Plant into a living process
Our Partners
59degrees Soil Architects
Soil architecture for biological function.
info@59degrees.com
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